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ZERN ENGINEERING™
by Blauberg Ventilatoren GmbH
Stäblistraße 6.
81477, Munich, Germany

HQ Tel. + 49 89 231 66 620 *multichannel HQ Fax. + 49 89 780 69 521 sales@zern-engineering.com
GENERAL DESCRIPTION

The rotary heat exchangers have a rotating heat wheel. The accumulating mass rotates permanently between the warm extract and the cold intake air flows. During rotation of the heat exchanger the extract air heat is absorbed with the cold intake flow. 

Heat recovery efficiency reaches 85 %.

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DESIGN

The rotary heat exchanger has a cylindrical shape and cellular structure in the form of traverse through air channels used for movement of extract air flow from the room and supply air flow to the room.

The reinforcing rods connected to the central hub and the aluminium shell provide rigid rotor design. The rotary heat exchanger is supplied enclosed in the galvanized steel casing with an electric motor as a standard.

APPLICATIONS
  • Air conditioning and heating
  • Industrial ventilation
  • Swimming pools
  • Paint booths
  • Agricultural premises
  • Marine environment
  • Industrial premises
APPLIED MATERIALS
  • The rotary heat exchangers are made of high-quality aluminium foil with the width of 100 mm and 200 mm and thickness of 0.07 mm.
    Optionally the foil may have a special coating.
Foil width [mm]100200
Foil wave height [mm]1,62,11,62,1
Foil thickness [mm]0,070,07
  • The casing has seamless design as a standard and is made of galvanized steel with variable thickness, depending on a size of the rotary heat exchanger.
MODIFICATIONS
Rotor
  • Shallow rotors of 100 mm depth (RS)
    The basic rotor modification has the depth of 200 mm. However the rotary heat exchangers with the maximum depth of 100 mm are used for ventilation units, which have limited space for the heat exchangers, design limitations or high requirements to pressure losses.
  • Rotor without casing
    The rotor may be supplied without a casing. The rotor diameter is from 200 mm up to 1900 mm.
Casing

The standard rotary heat exchanger is made of galvanized steel. Other customized versions of the heat exchanger casing material are possible, such as aluminium, stainless steel, painted steel.

COMPONENTS

The smart air sealing technology minimises air leakages in the rotary heat exchanger. It also prevents air leakage from the heat exchanger or mixing of supply and extract air streams. All the gaps between the rotor and the casing are protected with special brush sealing. These sealings are reliable, durable and easy to replace.

The fasteners are made of zinc coated metal to prevent corrosion.
The delivery set includes high-quality ball bearing of closed type.

MOTOR AND ROTATION SPEED CONTROL COMPONENTS
  • The rotary heat exchanger drive consists of an electric motor with a worm reduction gearbox, a pulley and a belt. The rotation speed from 10 to 13 RPM ensures higher heat recovery efficiency.
  • The three-phase electric motor is designed for connection to three-phase 400 V power supply and the single-phase electric motor is designed for connection to single-phase 230 V power supply. The motor power varies from 60 W up to 180 W depending on the rotor diameter.
  • The rotor speed is controlled with a frequency controller (not included in the delivery set).
TECHNICAL MAINTENANCE

During operation the air channels get gradually contaminated. This contamination not only decreases performance, but accelerates pressure losses. To attain the maximum performance regular maintenance of the rotary heat exchangers is required as follows:

  • Cleaning of the rotor cells with compressed air to remove dust and other contaminants
  • Regular control and check-up of the electric motor and controls
  • Control of transmission belt tensioning
TYPES. MODEL LINE
  • Depending on environmental conditions and operation requirements the rotary heat exchangers are available in various sizes and with various coatings from aluminium foil.

CONDENSING ROTARY HEAT EXCHANGERS. R-EX SERIES

This rotary heat exchanger type is made of high-quality aluminium foil with no special coating. The rotor diameter is from 200 mm up to 2500 mm. This modification is used for non-aggressive environments with requirements to high heat recovery efficiency.

Name D: rotor diameter [mm] A: casing width [mm] B: casing height [mm] C: casing depth [mm] h: wave height [mm] Foil width [mm]
R-EX D400 400 600 600 295 1,6; 2,1 100; 200
R-EX D500 500 600 600 295 1,6; 2,1 100; 200
R-EX D600 600 700 700 295 1,6; 2,1 100; 200
R-EX D700 700 800 895 295 1,6; 2,1 100; 200
R-EX D800 800 900 900 290 1,6; 2,1 100; 200
R-EX D900 900 1100 1100 290 1,6; 2,1 100; 200
R-EX D1000 1000 1100 1100 290 1,6; 2,1 100; 200
R-EX D1100 1100 1250 1250 290 1,6; 2,1 200
R-EX D1150 1150 1250 1250 290 1,6; 2,1 200
R-EX D1300 1300 1400 1400 310 1,6; 2,1 200
R-EX D1400 1400 1500 1500 310 1,6; 2,1 200
R-EX D1510 1510 1630 1630 330 1,6; 2,1 200
R-EX D1600 1600 1700 1700 310 1,6; 2,1 200
R-EX D1700 1700 2010 2010 330 1,6; 2,1 200
R-EX D1900 1900 2210 2210 330 1,6; 2,1 200
R-EX D2000 2000 2210 2210 330 1,6; 2,1 200
R-EX D2100 2100 2210 2210 330 1,6; 2,1 200
R-EX D2200 2200 2300 2300 330 1,6; 2,1 200
R-EX D2300 2300 2400 2400 330 1,6; 2,1 200
R-EX D2400 2400 2500 2500 330 1,6; 2,1 200
R-EX D2500 2500 2600 2600 330 1,6; 2,1 200

ENTHALPY ROTARY HEAT EXCHANGERS. R-E-EX SERIES (SILICA GEL COATING)

This rotary heat exchanger type is made of aluminium foil with water-absorbing coating. These heat exchangers enable sensible and latent heat recovery and are used for operation in premises requiring air humidifying with no air cooling.

NameD: rotor diameter [mm]A: casing width [mm]B: casing height [mm]C: casing depth [mm]h: wave height [mm]Foil width [mm]
R-E-EX D4004006006002951,6; 2,1100; 200
R-E-EX D5005006006002951,6; 2,1100; 200
R-E-EX D6006007007002951,6; 2,1100; 200
R-E-EX D7007008008952951,6; 2,1100; 200
R-E-EX D8008009009002901,6; 2,1100; 200
R-E-EX D900900110011002901,6; 2,1100; 200
R-E-EX D10001000110011002901,6; 2,1100; 200
R-E-EX D11001100125012502901,6; 2,1200
R-E-EX D11501150125012502901,6; 2,1200
R-E-EX D13001300140014003101,6; 2,1200
R-E-EX D14001400150015003101,6; 2,1200
R-E-EX D15101510163016303301,6; 2,1200
R-E-EX D16001600170017003101,6; 2,1200
R-E-EX D17001700201020103301,6; 2,1200
R-E-EX D19001900221022103301,6; 2,1200
R-E-EX D20002000221022103301,6; 2,1200
R-E-EX D21002100221022103301,6; 2,1200
R-E-EX D22002200230023003301,6; 2,1200
R-E-EX D23002300240024003301,6; 2,1200
R-E-EX D24002400250025003301,6; 2,1200
R-E-EX D25002500260026003301,6; 2,1200

SORPTION ROTARY HEAT EXCHANGERS. R-N-EX SERIES (MOLECULAR SIEVE COATING)

This rotary heat exchanger type is made of foil with high extremely hygroscopic coating. These heat exchangers are designed for permanent air dehumidification in premises with total heat recovery.

Name D: rotor diameter [mm] A: casing width [mm] B: casing height [mm] C: casing depth [mm] h: wave height [mm] Foil width [mm]
R-N-EX D400 400 600 600 295 1,6; 2,1 100; 200
R-N-EX D500 500 600 600 295 1,6; 2,1 100; 200
R-N-EX D600 600 700 700 295 1,6; 2,1 100; 200
R-N-EX D700 700 800 895 295 1,6; 2,1 100; 200
R-N-EX D800 800 900 900 290 1,6; 2,1 100; 200
R-N-EX D900 900 1100 1100 290 1,6; 2,1 100; 200
R-N-EX D1000 1000 1100 1100 290 1,6; 2,1 100; 200
R-N-EX D1100 1100 1250 1250 290 1,6; 2,1 200
R-N-EX D1150 1150 1250 1250 290 1,6; 2,1 200
R-N-EX D1300 1300 1400 1400 310 1,6; 2,1 200
R-N-EX D1400 1400 1500 1500 310 1,6; 2,1 200
R-N-EX D1510 1510 1630 1630 330 1,6; 2,1 200
R-N-EX D1600 1600 1700 1700 310 1,6; 2,1 200
R-N-EX D1700 1700 2010 2010 330 1,6; 2,1 200
R-N-EX D1900 1900 2210 2210 330 1,6; 2,1 200
R-N-EX D2000 2000 2210 2210 330 1,6; 2,1 200
R-N-EX D2100 2100 2210 2210 330 1,6; 2,1 200
R-N-EX D2200 2200 2300 2300 330 1,6; 2,1 200
R-N-EX D2300 2300 2400 2400 330 1,6; 2,1 200
R-N-EX D2400 2400 2500 2500 330 1,6; 2,1 200
R-N-EX D2500 2500 2600 2600 330 1,6; 2,1 200

EPOXY ROTARY HEAT EXCHANGERS. R-K-EX SERIES (EPOXY COATING)

This rotary heat exchanger type is made of foil with a special coating with high corrosion-, salt- and chemical-resistant properties. Used in swimming pools, paint booths, agricultural premises, etc.

Name D: rotor diameter [mm] A: casing width [mm] B: casing height [mm] C: casing depth [mm] h: wave height [mm] Foil width [mm]
R-K-EX D400 400 600 600 295 1,6; 2,1 100; 200
R-K-EX D500 500 600 600 295 1,6; 2,1 100; 200
R-K-EX D600 600 700 700 295 1,6; 2,1 100; 200
R-K-EX D700 700 800 895 295 1,6; 2,1 100; 200
R-K-EX D800 800 900 900 290 1,6; 2,1 100; 200
R-K-EX D900 900 1100 1100 290 1,6; 2,1 100; 200
R-K-EX D1000 1000 1100 1100 290 1,6; 2,1 100; 200
R-K-EX D1100 1100 1250 1250 290 1,6; 2,1 200
R-K-EX D1150 1150 1250 1250 290 1,6; 2,1 200
R-K-EX D1300 1300 1400 1400 310 1,6; 2,1 200
R-K-EX D1400 1400 1500 1500 310 1,6; 2,1 200
R-K-EX D1510 1510 1630 1630 330 1,6; 2,1 200
R-K-EX D1600 1600 1700 1700 310 1,6; 2,1 200
R-K-EX D1700 1700 2010 2010 330 1,6; 2,1 200
R-K-EX D1900 1900 2210 2210 330 1,6; 2,1 200
R-K-EX D2000 2000 2210 2210 330 1,6; 2,1 200
R-K-EX D2100 2100 2210 2210 330 1,6; 2,1 200
R-K-EX D2200 2200 2300 2300 330 1,6; 2,1 200
R-K-EX D2300 2300 2400 2400 330 1,6; 2,1 200
R-K-EX D2400 2400 2500 2500 330 1,6; 2,1 200
R-K-EX D2500 2500 2600 2600 330 1,6; 2,1 200
DESIGNATION KEY
Rx-x-EX Dx-x/7-0-1 AxBxC-x

R: standard heat exchanger type
x: foil width: «_»: 200 mm; «S»: 100 mm
x: rotor type: «_»: condensing type; «E»: enthalpy type, «N»: sorption type, «K»: epoxy type
EX: standard commercial group
Dx: rotor diameter [mm]: 200-2500

x: wave height [mm]: 1.6 / 2.1
A: casing width [mm]: 500-2600
B: casing height [mm]: 500-2600
C: casing depth [mm]: 250-500

7: standard foil thickness [mm]: 0.07
0: standard available cleaning section: 0: not available; 1: available
1: standard number of sections
x: number of phases of electric motor: 1: single-phase 230 V; 3: three-phase 400 V

GENERAL DESCRIPTION
  • The HC-EX4 counter-flow heat exchangers have a very simple design and contain no movable parts.
  • The heat exchangers of this series are made of polystyrene plates with cellular structure, which are interconnected with a special glue. The plate height is from 3 to 4 mm.
  • The warm extract and cold intake air streams are separated with the plate walls and do not come in contact with each other. This design solution excludes transfer of humidity, contaminants, smells and microbes from one air stream to another. Heat recovery efficiency reaches 79 %.
  • The accumulating mass is assembled into a rigid aluzinc casing.
  • The applied heat exchanger material enables operation in the temperature conditions from -25 up to +50 °C.
  • The heat exchangers are frost-resistant and keep the high performance after defrosting.
  • The heat exchangers require low maintenance. Water flushing is used for cleaning.
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FUNCTIONING
  • The outside intake air flows through the filter and the heat exchanger and is moved to the room with the supply fan.
  • The warm extract air flows through the filter and the heat exchanger and is exhausted outside by the extract fan.
  • In the heat exchanger the heat extracted from the warm extract air is absorbed with the cold air from outside.
  • Heat recovery technology minimises heat losses and heating expenses in the cold season.
  • The supply and extract air streams do not get mixed, so transfer of humidity, contaminants, smells and microbes from one air stream to another is not possible.
MODEL LINE
NameA: width [mm]B: depth [mm]C: height [mm]
НС-ЕХ4 300/95/С-130095100…500
DESIGNATION KEY
НС-ЕХ4 А / В / С - 1

НС-ЕХ4 – commercial group.
A: width [mm] 300;
B: depth [mm]: 95;

C: height [mm]: 100…500;
1: casing modification: aluzinc

GENERAL DESCRIPTION
  • E-EX4 cross-flow enthalpy heat exchangers are used to transfer both apparent and latent heat energy from one air flow to another.
  • In the enthalpy heat exchangers of this series an ultrathin polymer membrane is used as a separating
    barrier between the flows, which allows through diffusion to transfer not only heat but also moisture.
  • Due to its atomic structure, the membrane allows only water vapor to penetrate through it, while blocking the transfer of gases, pollution, odors, microorganisms and prevents the spread of viruses.
  • The enthalpy heat exchangers keep the balanced comfortable indoor humidity in dry winter and hot humid outside conditions.
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DESIGN
  • The heat exchangers are made with the face overall dimensions of 200×200 mm, 250×250 mm, 300×300 mm, 400×400 mm and 500×500 mm. The heat exchanging plates have the depth from 100 mm up to 400 mm.
  • The accumulating mass consists of aluminium waveform plates, that are laid perpendicular to the channel direction. The wave height is 2.7, 4.5 and 6.0 mm.
  • The vapour-permeable membrane is located between the aluminium plates. This design keeps the two air streams fully separated.
  • The casing has no movable parts and is made of various materials.
APPLICATIONS
  • Ventilation and air conditioning systems
  • Heat recovery ventilation in residential
    premises
  • School premises
  • Hospitals
  • Office buildings
AIRTIGHT SEALING
  • Air sealing process is automated. 
  • High-quality hot-melt synthetic-base polymer adhesive used in food and pharmacy industries provides air tightness.
APPLIED MATERIALS
  • The heat exchanging plates are made of high-quality aluminium foil with the thickness from 0.07 mm.
  • The membrane is made of polymer with microporous structure and has antibacterial coating.
  • All the casing components can be made of:
     – quality sheet metal (aluzinc);
     – high-strength aluminum alloy.
MODIFICATIONS
Two different casing designs are available for this heat exchanger series.
Version 1. Aluzinc casing

The head plates and profiles are made of high-quality sheet metal – aluzinc.

Typically applied for E-EX4 200/…, E-EX4 250/… and E-EX4 300/… heat exchangers.

Version 3. Aluminium casing

All the casing components are made of high quality aluminium sheet, which provides corrosion protection and has a low specific weight.

Typically applied for E-EX4 400/… and E-EX4 500/… heat exchangers. It is possible to use aluminium on other types of heat exchangers of this series.

MOUNTING OPTIONS

Depending on the task (project), several E-EX4 cross-flow plate heat exchangers can be installed in series or connected to modular units with the size, for example 1000×1000 mm.

OPERATION CONDITIONS
  • The applied materials enable operation, storage and transportation of the heat exchangers in the temperature conditions from -25 up to +50 °C.
  • Storage of heat exchangers in an exposed position in direct sunlight is forbidden.
  • The E-EX4 enthalpy heat exchangers are not subjected to freezing in case of normal operation conditions in winter.
TECHNICAL MAINTENANCE
  • Regular check-up of filters is required to keep the heat exchangers and the supply filter clean. The filters must be cleaned or replaced as required.
  • To remove the contaminations flush the heat exchanger with warm water up to 30 °C.
  • Do not use high pressure water jet for cleaning of the heat exchanger because it may damage the ultrathin membrane.
MODEL LINE
Name A: width [mm] B: depth [mm] h: distance between plates [mm] x: casing modification
E-ЕХ4 200 200 100…400 2,7/4,5 1
E-ЕХ4 250 250 100…400 2,7/4,5 1
E-ЕХ4 300 300 100…400 2,7/4,5/6,0 1
Е-ЕХ4 400 400 100…400 2,7/4,5/6,0 3
Е-ЕХ4 500 500 100…400 2,7/4,5/6,0 3
DESIGNATION KEY
Е-ЕХ4 А / В / h - x

Е-ЕХ4 – commercial group
А: width, length [mm]: 200/250/300/400/500;

В: depth [mm]: 100…400;
h: distance between plates [mm]: 2.7/4.5/6.0;

x: casing modification:
• 1: aluzinc
• 3: aluminum